<p>A patch for transdermal administration exerting a sufficiently high transdermal absorbability of a COX-2 inhibitor and an excellent antiinflammatory effect, which is characterized by comprising a substrate and a pressure-sensitive adhesive layer containing a pressure-sensitive adhesive base and a drug and being provided on at lease one face of the substrate, and the drug being valdecoxib or a pharmaceutically acceptable salt thereof.</p>
